A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8173-1 advisory.

    It was discovered that polkit incorrectly handled nested elements in XML policy files. If an administrator     were tricked into installing a malicious policy file, a remote attacker could possibly use this issue to     cause polkit to crash, resulting in a denial of service. (CVE-2025-7519)

    Pavel Kohout discovered that the polkit polkit-agent-helper-1 utility incorrectly handled long input. A     local attacker could possibly use this issue to cause polkit to crash, resulting in a denial of service.
    (CVE-2026-4897)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1546 advisory.

    A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively     long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input     can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.
    (CVE-2026-4897)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-1774635f74 advisory.

    CVE-2026-4897 aisle.com fix of unsanitized getline

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-387a47c82b advisory.

    CVE-2026-4897 aisle.com fix of unsanitized getline

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-054c0e22d1 advisory.

    CVE-2026-4897 aisle.com fix of unsanitized getline

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively     long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input     can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.
    (CVE-2026-4897)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
306544	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 : polkit vulnerabilities (USN-8173-1)	Nessus	Ubuntu Local Security Checks	medium
306210	Amazon Linux 2023 : polkit, polkit-devel, polkit-libs (ALAS2023-2026-1546)	Nessus	Amazon Linux Local Security Checks	medium
306075	Fedora 42 : polkit (2026-1774635f74)	Nessus	Fedora Local Security Checks	medium
304649	Fedora 43 : polkit (2026-387a47c82b)	Nessus	Fedora Local Security Checks	medium
304346	Fedora 44 : polkit (2026-054c0e22d1)	Nessus	Fedora Local Security Checks	medium
303884	Linux Distros Unpatched Vulnerability : CVE-2026-4897	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-4897

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium